An experiment of femtosecond laser absolute distance measurement by spectrally resolved interferometry

Weihu Zhou; Yao Li; Rongyi Ji; Yan Xu; Deming Liu

doi:10.1117/12.2035617

10 October 2013 An experiment of femtosecond laser absolute distance measurement by spectrally resolved interferometry

Weihu Zhou, Yao Li, Rongyi Ji, Yan Xu, Deming Liu

Proceedings Volume 8916, Sixth International Symposium on Precision Mechanical Measurements; 891607 (2013) https://doi.org/10.1117/12.2035617
Event: Sixth International Symposium on Precision Mechanical Measurements, 2013, Guiyang, China

Abstract

An experiment of absolute distance measurement by spectrally resolved interferometry has been executed. A Ti:Sapphire femtosecond laser without stable frequency and stable phase was used as an optical source of the measurement system. It greatly simplifies the complexity of the measurement system. A Fabry-Perot Etalon made by ourselves was employed as an optical filter to pick up frequency modes from the broad bandwidth spectrum of femtosecond laser pulse. To achieve the absolute distance, a linear array CCD detector was used to get the interferometric phase information for the calculation of distance. The measurement experiment was carried out in the non-ambiguity range and ranging precision of less than 5 μm was achieved. The result indicates that it’s feasible to measure the absolute distance by spectrally resolved interferometry with a simple femtosecond laser.

Citation Download Citation

Weihu Zhou, Yao Li, Rongyi Ji, Yan Xu, and Deming Liu "An experiment of femtosecond laser absolute distance measurement by spectrally resolved interferometry", Proc. SPIE 8916, Sixth International Symposium on Precision Mechanical Measurements, 891607 (10 October 2013); https://doi.org/10.1117/12.2035617

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